| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 9B30.00 | Function Generators | | |
| 9B30.10 | audio frequency oscillator | A-27 | A
tube with a resonant RLC circuit oscillating in the audio range. A bank on
capacitors with separate keys makes an organ. Diagram. |
| 9B30.10 | audio oscillator | S-68 | A tube era audio oscillator. Circuit. |
| 9B30.11 | noise generators | AJP 32(7),v | Schematic
for a thyatron noise source. Listen and show white noise on a scope, insert
a tunable adjustable width resonant circuit and show sinusoid as Q increases,
some interference demonstrations. |
| 9B30.12 | square wave generator | AJP 44(1),110 | A five component TTL square wave generator with a range of 0.1 to 50 kHz. |
| 9B30.13 | digital waveform synthesizer | AJP 44(7),710 | A simple ten step waveform digitizer made from three chips. |
| 9B30.14 | plucked string oscillator | A-28 | Modify the audio oscillator in A27 to be a damped oscillator that sounds like a plucked string. |
| 9B30.15 | gating amplifier for tone bursts | AJP 49(3),275 | This circuit gates bursts of periodic signals to simulate Fourier analysis of a single pulse on a wave analyzer. |
| 9B30.16 | harmonic oscillator circuit | AJP 46(10),1080 | An
op-amp based harmonic oscillator capable of demonstrating the interaction
between the initial transient and steady-state motion. |
| 9B30.17 | freq-scanning for wave analyzer | AJP 35(8),v | A frequency scanning device and output coupler for use with the HP 300A wave analyzer. Circuits given. |
| 9B30.20 | low-frequency current source | AJP 33(11),965 | A mirror on a pendulum directs light onto a photovoltaic cell giving a oscillating output. |
| 9B30.20 | very low frequency oscillator | AJP 45(12),1234 | Circuit for a .25 to 2.5 Hz oscillator based on the Intersil 8038 IC. |
| 9B30.20 | ultra low frequency oscillator | AJP 43(1),113 | Mechanically rotate a Polaroid between a light source and photodetector pickup covered with another Polaroid |
| 9B30.20 | very low frequency oscillator | A-24 | A tube circuit for generating very low frequency sine waves for ac circuit demos. Diagram. |
| 9B30.20 | very low frequency alternator | A-23 | Plates
connected to a 12 v battery rotating in a salt water bath give ac at the
frequency of rotation for use with slow circuits. Diagram. |
| 9B30.20 | Welch turntable oscillator | S-1f | A slow oscillator made from two turntables. |
| 9B30.30 | RC phase shift oscillator | 33-2.7 | A single tube RC phase shift oscillator. Diagram. |
| 9B30.40 | spark discharge oscillator - paralle | A-30 | A circuit for generating high frequency damped oscillations by spark discharge with parallel resistance. |
| 9B30.40 | 10 MHz oscillator | A-32 | Directions for making a 10 MHz oscillator. |
| 9B30.40 | UHF oscillator | A-36 | Using "modern" tubes to generate UHF oscillations. |
| 9B30.40 | modulation of HF | A-40 | The plate of the oscillator in A-36 is modulated at an audio frequency. Diagram. |
| 9B30.40 | spark discharge oscillator - series | A-29 | A circuit for generating high frequency damped oscillations by spark discharge and a series resonant circuit. |